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学术讲座【Interplay of Topology and Geometry in Fractional Quantum Hall Liquids】

时间:2017-11-23浏览:264设置

时间:2017年11月27日(星期一)下午14:00-15:00

地点:旗山校区理工实验楼3-303

主讲:杨昆教授(Florida State University

主办:物理与能源学院、福建省量子调控与新能源材料重点实验室,福建省太阳能转换与储能工程技术研究中心

专家简介:杨昆,美国国家强磁场实验室和美国佛罗里达州立大学W. Guy McKenzie讲座教授。美国物理学会理事(APS fellow),美国科学进步协会理事(AAAS fellow),清华大学长江讲座教授。1994年美国印第安纳大学获博士学位,先后在美国普林斯顿大学和加州理工学院做博士后研究,1999年加盟佛罗里达州立大学,历任助理教授、副教授、教授、讲座教授。研究领域主要在于理论凝聚态物理和统计物理。1999年获美国斯隆研究奖,2004年获海外华人物理协会杰出青年研究学者奖,2015年获美国物理学会杰出审稿人奖。

报告摘要:Fractional Quantum Hall Liquids (FQHL) are the ultimate strongly correlated electron systems, and the birth place of topological phase of matter. Early theoretical work has emphasized the universal or topological aspects of quantum Hall physics. More recently it has become increasingly clear that there is very interesting bulk dynamics in FQHL, associated with an internal geometrical degree of freedom, or metric. The appropriate quantum theory of this internal dynamics is thus expected to take the form of a “quantum gravity”, whose elementary excitations are spin-2 gravitons. After briefly reviewing the topological aspect of FQHL, I will discuss in this talk how to couple and probe the presence of this internal geometrical degree of freedom experimentally in the static limit [1], and detect the graviton excitation in a spectroscopic measurement [2]. Comparison will be made with recent experimental [3] and numerical [4] work.

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